Influence of Ce/Cu ratio on the performance of ordered mesoporous CeCu composite oxide catalysts
发布时间：2024-10-10
点击次数：
- 影响因子：
- 13.3
- DOI码：
- 10.1016/j.cej.2014.02.059
- 所属单位：
- 重庆工商大学
- 教研室：
- 化学工程系
- 发表刊物：
- chemical engineering journal
- 项目来源：
- 重庆市科技局，催化基础国家重点实验室
- 关键字：
- CeCu composite oxides；Ordered mesoporous；Phenyl VOCs；Catalytic combustion；Reactive oxygen species
- 摘要：
- CeCu composite oxide catalysts were prepared by a hard-template method using different mole ratios of Ce/Cu (being designated as CeCu-HTx, where x is the Ce/Cu molar ratio). The prepared catalysts were characterized by XRD, TEM, AAS, XPS, and H2-TPR. The catalytic properties of the prepared CeCu composite oxide catalysts were also investigated by phenyl VOCs (benzene, toluene, xylene, and ethylbenzene) catalytic combustion in air. XRD results showed that the CuO species can fully dissolve into the CeO2 lattice to form CeCu solid solutions having the fluorite structure of crystal-phase CeO2. TEM and low-angle XRD results indicated that CeCu-HT3 had a well-ordered and developed mesoporous structure with uniform pore size, which is better than the CeCu-HT2 and CeCu-HT4. XPS and H2-TPR results showed that CeCu-HT3 had abundant active oxygen species and superior reducibility. CeCu-HT3 had higher toluene catalytic combustion activity than CeCu-HT2 and CeCu-HT4 in air. The minimum reaction temperature at which toluene conversion exceeded 90% on CeCu-HT3 was 225 °C. Toluene catalytic combustion conversion on CeCu-HT3 at 240 °C exceeded 99.3% with decreased toluene concentration in air to below 70 ppm. The phenyl VOCs catalytic combustion activity on the CeCu-HT3 catalyst follows the order ethylbenzene > toluene > xylene > benzene. The CeCu-HT3 catalyst shows high stability and efficiency for toluene catalytic combustion in air. And the CeCu-HT3 catalyst can be applied in purification treatments for air containing a wide range of toluene concentrations.
- 第一作者：
- 周桂林
- 合写作者：
- 兰海,高涛涛,谢红梅
- 论文类型：
- 源刊论文
- 通讯作者：
- 周桂林
- 论文编号：
- O0SDRJVAHG33I1SZX3T1XCSKZ41L2FPL
- 学科门类：
- 工学
- 一级学科：
- 化学工程与技术
- 文献类型：
- Journal Article
- 期号：
- 246
- 页面范围：
- 53–63
- 是否译文：
- 否
- 发表时间：
- 2014-06-01
附件：